Quote:
Originally Posted by MercFan
But that's exactly what I see when the engine is running.... I do believe it's something new that was not there before... the only other thing is that I recently cleaned the vent tube (looks like a little trumpet - under the car on the driver's side rear) that vents the tank to the atmosphere - took it apart and it acted like it may be a check valve - though not a strong one as I could overpower it with my breath... anyway - I wonder if I may have re-installed that part backwards!? Possible for these symptoms?!
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If the fuel is cold and the engine is hot it is possible that tiny bubbles could be de-gassing fuel, or, there could be a leak. I am not sure how a leak would not show up as dripping fuel.
BTW: About Viton
A few of the flexible OE fuel lines on my car have survived years of B100. They are
1) The flexible hose from the tank to the long stainless line.
2) The line from the long stainless line from the tank to the stainless line that goes to into the engine compartment.
3) The "cigar tube" that returns fuel to the tank.
I think the lines that connect the primary filter would have survived had my mechanic not changed them to some incompatible material. The return tubes from the injector eventually leaked, but it may not have been the B100.
The grommet around the fuel filler neck melted away immediately.
Depending on the year of your car, Viton may not be needed everywhere.